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Goodwill and Purchased Intangible Assets (Tables) | 6 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill Balances | The following table presents goodwill carrying value and the movements by reporting unit during the six months ended December 31, 2018:
(In thousands) |  | Wafer Inspection |  | Patterning |  | GSS |  | Others |  | Total
Balance as of June 30, 2018 |  | $ | 281,005 |  |  | $ | 53,255 |  |  | $ | 8,039 |  |  | $ | 12,399 |  |  | $ | 354,698 |
Acquired goodwill |  | — |  |  | — |  |  | 4,631 |  |  | 1,176 |  |  | 5,807 |
Foreign currency and other adjustments |  | (25 | ) |  | — |  |  | — |  |  | — |  |  | (25 | )
Balance as of December 31, 2018 |  | $ | 280,980 |  |  | $ | 53,255 |  |  | $ | 12,670 |  |  | $ | 13,575 |  |  | $ | 360,480 |
Components of Purchased Intangible Assets | The components of purchased intangible assets as of the dates indicated below were as follows:
(In thousands) |  |  | As of December 31, 2018 |  | As of June 30, 2018
Category | Range of Useful Lives |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Amount |  | Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Amount
Existing technology | 4-7 years |  | $ | 166,029 |  |  | $ | 146,001 |  |  | $ | 20,028 |  |  | $ | 160,859 |  |  | $ | 144,202 |  |  | $ | 16,657 |
Trade name/Trademark | 5-7 years |  | 21,073 |  |  | 20,143 |  |  | 930 |  |  | 20,993 |  |  | 20,060 |  |  | 933 |
Customer relationships | 4-7 years |  | 58,050 |  |  | 55,388 |  |  | 2,662 |  |  | 56,680 |  |  | 55,136 |  |  | 1,544 |
Other | <1-5 years |  | 1,270 |  |  | 1,072 |  |  | 198 |  |  | 660 |  |  | 461 |  |  | 199 |
Total |  |  | $ | 246,422 |  |  | $ | 222,604 |  |  | $ | 23,818 |  |  | $ | 239,192 |  |  | $ | 219,859 |  |  | $ | 19,333 |
Remaining Estimated Amortization Expense | Based on the purchased intangible assets gross carrying amount recorded as of December 31, 2018, and assuming no subsequent additions to, or impairment of, the underlying assets, the remaining estimated annual amortization expense is expected to be as follows:
Fiscal year ending June 30: | Amortization (In thousands)
2019 (remaining 6 months) | $ | 2,218 |
2020 | 4,438 |
2021 | 4,438 |
2022 | 4,438 |
2023 | 4,242 |
Thereafter | 4,044 |
Total | $ | 23,818 |

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